Pith Number

pith:5CQT5RGY

pith:2009:5CQT5RGY6S4R5C53FDMMLYIUIA

not attested not anchored not stored refs pending

Experimental filtering of two-, four-, and six-photon singlets from single PDC source

Magnus Radmark, Marcin Wiesniak, Marek Zukowski, Mohamed Bourennane

arxiv:0903.2454 v1 · 2009-03-13 · quant-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5CQT5RGY6S4R5C53FDMMLYIUIA}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T02:14:28.384290Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e8a13ec4d8f4b91e8bbb28d8c5e1144012c854775055d60a1ec154952c8a1dba

Aliases

arxiv: 0903.2454 · arxiv_version: 0903.2454v1 · doi: 10.48550/arxiv.0903.2454 · pith_short_12: 5CQT5RGY6S4R · pith_short_16: 5CQT5RGY6S4R5C53 · pith_short_8: 5CQT5RGY

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/5CQT5RGY6S4R5C53FDMMLYIUIA \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: e8a13ec4d8f4b91e8bbb28d8c5e1144012c854775055d60a1ec154952c8a1dba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e4106c651b2bc44ffd2533627035634a2d1f2ef975b54fb887f5169fe99c0e1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-03-13T18:36:21Z",
    "title_canon_sha256": "afcf03993be1c0b03992eca337da20fcc5109192caa5f2643716be667e6c9f37"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.2454",
    "kind": "arxiv",
    "version": 1
  }
}